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139898 — NUT,TUBE COUPLING

✓ Government record, cited
Hama · HOSE FITTING
PRODUCT OVERVIEW

139898: NUT,TUBE COUPLING.

The NUT,TUBE COUPLING is a Hama industrial component. Key specifications include material: STEEL COMP 316 OVERALL, nut_style: TUBE COUPLING, nut_height: 0.594 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN, thread_series: UNF, thread_direction: RIGHT-HAND, length_to_shoulder: 0.527 INCHES MINIMUM AND 0.537 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-142-2579, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
139898
NSN: 4730-00-142-2579
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialSTEEL COMP 316 OVERALL
nut_styleTUBE COUPLING
nut_height0.594 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
thread_seriesUNF
thread_directionRIGHT-HAND
length_to_shoulder0.527 INCHES MINIMUM AND 0.537 INCHES MAXIMUM IN
width_across_flats0.563 INCHES NOMINAL IN
nominal_thread_size0.438 INCHES IN
drilled_hole_diameter0.047 INCHES NOMINAL IN
hole_type_and_quantity2 DRILLED
thread_pitch_diameters+0.4050 TO 0.4076 INCHES IN
hole_configuration_styleCONFIGURATION B
NSN4730-00-142-2579
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 139898 · Hama ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
LENGTH TO SHOULDER: 0.527 INCHES MINIMUM AND 0.537 INCHES MAXIMUM IN
•
WIDTH ACROSS FLATS: 0.563 INCHES NOMINAL IN
•
THREAD SERIES: UNF
•
HOLE CONFIGURATION STYLE: CONFIGURATION B
•
THREAD PITCH DIAMETERS: +0.4050 TO 0.4076 INCHES IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5649 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.438 INCHES IN
TECHNICAL CHARACTERISTICS
LENGTH TO SHOULDER0.527 INCHES MINIMUM AND 0.537 INCHES MAXIMUM IN
WIDTH ACROSS FLATS0.563 INCHES NOMINAL IN
THREAD SERIESUNF
HOLE CONFIGURATION STYLECONFIGURATION B
THREAD PITCH DIAMETERS+0.4050 TO 0.4076 INCHES IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5649 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.438 INCHES IN
NUT HEIGHT0.594 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
DRILLED HOLE DIAMETER0.047 INCHES NOMINAL IN
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 139898?
139898 is a NUT,TUBE COUPLING manufactured by Hama.
What is the NSN for 139898?
139898 is cataloged in the U.S. Government catalog under NSN 4730-00-142-2579. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.